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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f77460a87c11a0ed8e8708c1a0a7326a617e70b3a8c570eb4df380b013ad2d8' 
  AND token = 'COeOs2uyeukSmr6HxlmVTIr/GtFS8VriOCodOnHXCfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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