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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4227cbe75ae4cd32416b024a6785836e735bf5d157ed4e0b4708e21a9a99db9' 
  AND token = 'jaNRaZBIkxzmnKafsGfbHPj2Pphjiniubs0mvwj63AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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