Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cedf38897c000a9bac26d53530c3e31e6881559b07ec46e095624869c2799af' 
  AND token = 'SOGZ1kgdjVscc1VHTYbYD+HBZlSeJvwJ8ZvskUa1krQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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