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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25201a36433c2da2a8d5fb22b7001d5db85e7b7e91740fc8bc183212434daa02' 
  AND token = 'CNUDCu0pxVgy/T8Q/NDOakTD5XikoG8SrH57SVKGI5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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