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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69616458e46e07f8061427109b022fabef3bbc2e7c6bface1fa9cabca69b08f8' 
  AND token = 'WL9FeBFGNt2qvE2s8H2fE7VDuKOgKOzlq5TJ6OapEDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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