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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c2f24061d5eed7a79110f3ec051460ad3cf80d501415290c1deba6c1befafa0' 
  AND token = 'TggpgrUHqnpH60adC0KWrkPIba1Ykps3iNjK9f8ZJQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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