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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1a83a6d2b3d9aa8ba41b57f021244d787e1ff7f44165df09804fde8030bfde8' 
  AND token = 'mrQcvXCKTR+euDCIcNp3ZLl1u8dz5s79JUdc/z/EPm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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