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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd2bdd0e1ae36d6d1cc0ff8c50f167f6bd39bb2035e0e29f688ef89d3d31795f1' 
  AND token = '7A0ugw8m9GbdPHcqpEa/3tYFVTaYTdMMB9bdLMbAwM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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