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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c50753c63cd6669dd57d8c633c4674a5441389099cd9d44bbdbf94c215ca295' 
  AND token = 'vXb+73F5bPW3N+7azWRcJ9QIrmsluqt0Fz5biN0O80M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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