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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdda93e4c4bb25d2af15a5fa09678220b9e1271ca9183e34cb75da99364dc5a7' 
  AND token = '/7uxCdoaxLq5TwbpOYmV5gHbhcmwc6TQwiiLFfy/HzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00085

JSON explain

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