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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9fbd671bee7034e3b73f7813b164dc8773e6c5e38aec0fccffcc26004f9f419f' 
  AND token = 'aW4vvXnSxuExu9tu/6CWU/5LwJfnvaa8UIsK8yUWqHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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