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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '5d02358d7e6d1af6f8af6d2d7c7b763886c098651eed15d9d6a264ba005c162a' 
  AND token = '0giuaVNmJRUnCeFtbfO78Vf3Qvc/NykP95XlXmA6BpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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