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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5cd09cb51fdc62608e8195c99a097387684c058edb72604fdcd28fa469a1416' 
  AND token = 'GLSfYa/fLtmjzFBRl8/WZomDi/8iXBETWF800JABw8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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