SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '61cb88b082049728cd1ec4ce072098aee63b138d257678923e1d4fa95e83a195' 
  AND token = 's0MOwVzOZS966I+nN1wL9P1OoqPpgkOj5snKLEs/uCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}