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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '692c7a706df8d215554f3adfd5f83f5c5c27b1cf28ef738de00bf8b7727a5e6e' 
  AND token = 'D7LIaTf6grqNRm4jeR4HG5QlGSJm0LcNV7lGvJy/bgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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