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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4541a600c6d95362d6a9efe5c8cdaed98668b561ba936d954b4ed7f93e7b1906' 
  AND token = 'Azl7fbyGnRdIRf/XzTvYHz2TrLT07NuPlrKe2pGJGh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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