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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c1e8925f862972970ace696974cdae6d50e180e3f74af285708d8d84691f849' 
  AND token = 'sNmatEGrHyc3/H7vjreJXEm5R8euDqY6zt4GHQC4NpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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