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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '267a25116b60a6e0f2d3cc244a5ba8c3005762bca94d1df23a3e41151c7a2462' 
  AND token = 'pbwdQQSpIuhLxS9aUDYm7WenYGArmCd/YkD4rh+loNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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