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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ff6deb3950fcc0f076287090fecfc5b0cc37dd0ca2aef23e254134ec783d054' 
  AND token = '1CukDoDurpnudwe4Dhy40eD/NKFT1niGsmYf4wUA1Mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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