Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e700d963dce254c2096944795e8f4fdd523b3c8bcad2639c4f03043fc953cafc' 
  AND token = 'OTgvml6l4G0q6dGWHN85UBBmVmujK7/btUN6yP1jxMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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