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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aba289d3c5c159c91ca78d999d2ac665c69596e2751ecb532923cd83e92ed17' 
  AND token = 'QzWfzRHiXa1qAuym0WsCl4JLe6Kvp2gHU3rHvlPCkHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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