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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f16d78e97bdc9fbe6ca6e5029c6a58b544c00856db6a5cb19bc9811fa52f9630' 
  AND token = '98/akGJKHa+L+2Sgi7rteOxO9+EBC5YrgDtTmcT1dvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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