Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '45798f0a7c28b09f7288c2d3aa3776fd6bddb98a7424fd0b42ff5f2ea9ba354e' 
  AND token = 'FZp0vEGNI2N51xwDh2qNx9JyMC9soCZ1mfnwVPFTxyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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