Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75e85486d60ff6606b1a1bbbed4c6eb0b53ce8488cc47f40f175b77c7854035a' 
  AND token = 'XkFcH4D7Gx24O7g/9H0Z18lLTnCbpRf0/sAfqXreKcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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