SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e5d519fe6d4890936bd25222ace751da1f3d846f52355f0882573b4afd0fb80' 
  AND token = 'e1y9kt7pn/7IXKjpXUKqTvY8uUj9/YW1zV+GuOXMU7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}