SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '27092053e9574a56ebf3bd8fbf87e268a3caabb1fb6b363b7530d57fc0f83980' 
  AND token = 'fDm8rcbKXTWMGA5yJhYN+xTvp4VH7sgfTz1aiRPmkRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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