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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84614a73a2083fdfe3a809e7ae0be8080c3be2368cd8da41f757ed3a57114da5' 
  AND token = 'aWHZvxx2ZBNoS23bzmCYHkqZqms/ASLAl6oJr2R3yQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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