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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06107c1042ae31e1b494ab2f18e762c0a5434aa20c8a37e31fe060e290302efe' 
  AND token = 'zpOnBJGDjPRjJUoPAO4xHqusIIrarShStc4sh2gZKMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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