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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ac8379d712a1f9aac78a0bb89371c6ce8cd19bb61a7b3dbcd717b906743dd04' 
  AND token = 'RVdUoT1nTaFjf43NgZxWwKgBozYPPE2yeYH12GBHzsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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