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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed902b90777433221b1fa0fa6554757022ad87437532d360f0381fc7be5a4a22' 
  AND token = 'Gl3e0PsVnFI6c6OjdLlPKtVd2zmkQ8I7xUqmL2fmcAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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