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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfa30f8d7cacd387f795ad2b06b37e033cdf91a236ce5678aefa2545a528742c' 
  AND token = 'cA5N3AqUu+SBAiTXMx/yd1zVyUA2ZCR7mloKsWkNxpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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