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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1dbca178f72d43d24e3b12f1b06bb88ab871ce2c5669da96a8235d1f4a4d62d' 
  AND token = 'hkKOooa2QfVtcq70C0x904LnrkDn2iIaRWQNI2bODUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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