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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f1052f894b5e653016384310f1c2059117d35b70efd4ca3d5a32b175cdd4afe3' 
  AND token = 'zXZ+YV2u3Yt5QhlCW4DaCZnoPT0mFpzNt1+F/Tc49ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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