Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6dc3e2e4db02066ae2168bd4a4f0e791df4a74821cf68fcc1a1bb0729129575' 
  AND token = 'SQ9vNPq0im/56vcoEmF+P7CQ1oLmAdeC1pAcKravJjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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