SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caa68cc3a827e690d794b37495b3d63f3c3f8bed85e24a728529610fe2fac889' 
  AND token = 'shXGIRJKCJ/K2sQCoGWTDDoJIcNZATISZbnhxSbBVkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00482

JSON explain

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