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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dde05e0e378908d1f69008d9744b68ff0f0e3866681c8a9d51e46986a6b0035d' 
  AND token = 'Y4tR2u40u7IXSwRE7RtUhIIwuUNJqx6k1gnNu9ntO6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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