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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22e6cefe685122047093904a9d3cd79a1b35b4aea158e136e76f3ec81991dbef' 
  AND token = 'g9RJfafDteFAoQCoqftCFcd6ky0nu4yfw+d7ZYiT0qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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