Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ead8219892999bf3df03bc9d8d14cd5cf28b7cd31c34849c5c88094d6d3579e' 
  AND token = 'aHdcZkA4ZU/3SQPS0eNAvxCCMRpTPw6e790awF6pS94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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