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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1fa46928cb6951f4ee8e4c3a4b4e773aec677d8bc9d582ca3d89628c6e356997' 
  AND token = '7FrF2PeehFdoTjeDyBjrNMic5IlLWJO5AF5oPUc9s2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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