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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9fc00f81d8087aeb7b40da38551e48aaacbd0e3fd91002833c72a0bf93116f9e' 
  AND token = 'q+aA3BASNOf48WEYjpd/2v5vPb69VJsxpQf4Ienj6ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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