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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80113b1fb3030e37f7977bfdb3555ed627b1971890eaca4831e4def2349ef328' 
  AND token = 'mMYyJElRTrWfMjD4L8ACk0MJZ62BjR4XHhRHYEKKQ4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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