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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11ca31e1945ea71f78593ca7c92bba500c26c27cee464b8177d920083c2fa542' 
  AND token = 'qu2VMcg9ztlYwISNa7/556nAAoXSPiQ5uD2yVTzOFFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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