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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98c95513164b52c2b6cdcb44d36bebba81ec981e18370ba5175b5c91d4fe4bfd' 
  AND token = '2ryEu1QZ9ApHt5kGev62c18s2TAz68jA12Kvh0aiCSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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