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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c45c8138a9c80ab3e553f8497300dd8c113e9013d529ff843f7c4f5c1bf9df1' 
  AND token = 'JgEwjI7GZ4cI7LX76yFuHSMKMq2DE1JdvPDSfSstZ6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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