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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '087c6c768f82fa54711bfb64a36152c39ed96306d9bc53ba19b1f3322a7bea66' 
  AND token = 'EHsM9zE7zx7WWphy3OLFhhJNa6M/VjdfeiFgopgl1x0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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