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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d23a7d3b866d30ed18b05b7d177131c5c6302a30cf393ff4a2f5a0e1dba24fb' 
  AND token = 'c+VS0ZmCq/6Oi6yns7UWuFLFFve9IJAAweb+Rtev/H4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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