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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f586a33185839e78abbdc999f4274d3859be13ebcd151dd11c715d79f7b11fd1' 
  AND token = 'CTOgMQv/oMl8M2wZrTnb9pIMJBaKWc8iLVCKJnhDm2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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