Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2e021da1e3ec76da3f4b5d4c000890dc5f9bc9a0790543496a8dbebe03d7175' 
  AND token = '10FP+1Yr7OyJOPNzHMN5iSrOmrmTImcTliKqsk59BzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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