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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80dfbb7b8d904b6c0e01ab1514c475632f973aa912c1f72db38997e1fa661fe6' 
  AND token = 'Vi6Wrf928sqtfvN7A9fkWHrnu+Ypx446rA7EafquJj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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