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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a11496174c139dab7a614ab0cff2a283f7aedf0be3de371c6f758ebb5dbfc9a' 
  AND token = 'VpZpifcYvFUDYfsLcoU/x3zt0YkQQJMkQTn1tGm5FkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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