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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'efec7b8d2a3064ca59eca4c32919753ebf2163985a8c48034e6ea11c3a24bed3' 
  AND token = '8IKNTdz5+z3e2feA6VV5Xc6lfDzeoxyaNCHwupFQX18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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