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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c26c27415e3fe0a1009f4aa933d904332fbfaf55c8276501715bbd8ba879161' 
  AND token = 'A7O54mRfF4NvbjnjOdpaio6Frcr1RNx0N/sKR6Xrv8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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