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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aa89f31730f7652055aa1fa5f8f1e5636081995adc5b88d4c6506ea1ebd41d9' 
  AND token = 'iu8qE6jFk+rabxPNSAwnoGYTMu8LB25boQPKhATZrdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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