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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f32afe97903850a172d163a6a50f96fc13b96e1e3aea7a2c021c5be2a2167309' 
  AND token = 'tnKaOAgn5Cb6bIv6/qwUojJ1s1fB+lzEa1EXHJf/gQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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