Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e997bcec0c149040a2c2b4b6502f3526c202d6f896e20c1ef8c1d17f2e61fa01' 
  AND token = 'R6vxxOJu4DBoROXkNifes/txN2f34w+KgABQFDaB6pQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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