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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae6f15d22ae09d8d1af8d421bd7d1d22ec441e60471eebf09ec81427827856fc' 
  AND token = 'i1PJ+R4O8+J0P0ceUp00cglwZTrnd64DvnKoEJjKoog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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