Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '536f433b0b875f5f0489cf76acf96b6af2e29392711d77d98cb2505a03703438' 
  AND token = 'Qh9pNg5H1UkeZtEek391mE26rWrlr4gqY+5WiSChjHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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