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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '19d87730d4ff2f15f83069f2c1c1333ab87c009c8ff96930a76d80eade10bbe9' 
  AND token = 'EEXwGiNyXlV0Zi3rrsNg54S82awlD29byR16LU/CteI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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