SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfe4baea9f8fa90c45eb3fbb2916426cfd86a089db20fc9bfb96b1ec2d938205' 
  AND token = 'TClqxupjZSjDUfzUshIRqrbY/W8Z7NHG3lBQ/w56oGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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