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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '898d47534c4ca4e2f875566ae6aa9f0593ce55e5cb5909655c66b9971d0b69f8' 
  AND token = 'Ihp2n/xpL8U3t1Ll4EVm2A1KzXejD9/dAk2mzvxs4Ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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