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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f87c788d16eec745f382987ee7be63ede052003e19760cf86ecbe357c099eb4' 
  AND token = 'VfY6tUSJleg+Tvsz/l0L6urLBx6WKlICV8vHM43AbJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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