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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f08fd7b799d042dfd399cdd2fc0e8ef45350db3b7d6e9f51e67a2a8656a6d3ea' 
  AND token = '4jDDoMEF02s9bo63n9gYCHQWKlUXOk3foSgC4bDHnxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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