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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '732e53b0f501725108bd86d4d4c7a9c3375b86fdcd07350168ddc3c90298aa4e' 
  AND token = '8nxrTuX2huEhFGi0sHRILroDiP/vweARkdmiad7HCnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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