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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'accbf953fc8e680d9a686cb01633484989d528aefacc8e85628e2998080dd1bc' 
  AND token = 'wGpA/q8JoTNIUrRRiewKNm4JaJkE/PPquUh+zWK43RQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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