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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92a481749215075c8dbd48915995ef883c43233e8f417afb849821811300a645' 
  AND token = 'T9W6X3cgW7mBxJQx2FfaiShHzmxyfI76AeAJafCm3Zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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