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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4516c8a5afc2cfd46e689d073f9a8aba2086a4463073ae9f11e02b7f006d4e' 
  AND token = 'sWL367oGVvyPECeMABL3ZwlkW14E9viRE7rdn0PUEV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}