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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ba1ed0716936fa18e81944f0ca9029d5b748e24014765c2a308a9096131686c9' 
  AND token = 'RBPNShaetkvLhsub9WaKmBsWxJbnKy3/oM70R3JFr6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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