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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30400e3d864ed31bcc374d200541a0a94d5e0ec6457ef8b97c4a047bfd4c5415' 
  AND token = 'HQLz0UAybd5jLX0z94ENZohIjsVY3nM3PKtpR/RBPLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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