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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00acb0402bc62870693084bc759262ec1ecf0193a8c97d175e2d3e3ca0d276cb' 
  AND token = '69qOSAWzlleI1kXim0RkF0iIGHxfhV9Ot83BzDOsQBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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