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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff423d1fbebe46eaf1c015a97a36477d2d1719ec3a4c2c9d72a9e75efdd981af' 
  AND token = 'ufOOab2ab5PBE1T7MMjogTHbbDKkgViePVsoe77mhS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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