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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09a0c652b64baeb4878a6081fc61884fdb6b075da06e56e195ea20b10df79934' 
  AND token = 'spWDjgmTlxlEg43ZtrvdIRBjWUc0S2cZMxmUbPEN0xM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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