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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'b57d9e8b49cf03dfd1af27fb3a32ce0659b4ebd5e7864c8f67e57501301097e9' 
  AND token = 'TF4m3F8JOC82G5hgjFv60Hne6wv0C2uvUN4+wA2uWPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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