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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab3e85bc2cd0e194437a0881b052404865281bb03033e70554028698dc213e88' 
  AND token = 'ipgEXZD3jUj9TnEu6yxvqQ5q9F19a5n3DuxvsT0fT7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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