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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b096845bd570b9ce1901e7ac844e482b5ef033a1dfedf29f21d0d7af23ee0cef' 
  AND token = '3LIKueDqBBLY+p96gk1ZQSgXIQ9Ar1mGVapg7HUF41I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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